<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #bx{color: burlywood}
        .c1{color: chartreuse}
        /*p{color: red}**/
        /*分组选择器*/
        h3,#bx,.c1{background-color: chocolate}
        /*属性选择器*/
        input[type='text']{color: red}
        input[type='password']{color: blueviolet}
        /*任意元素选择器*/
        *{border: 1px solid red}

    </style>
</head>
<body>
<h3>.......</h3>
<p id="bx">冰箱</p>
<p class="c1">电视</p>
<p>洗衣机</p>
<div class="c1">人</div>
<input type="text" placeholder="用户名">
<input type="password" placeholder="密码">

</body>
</html>